User`s manual

CHAPTER 2 USING THE PROGRAMMABLE

CONTROLLER CPU MONITORING

FUNCTION

This chapter explains the programmable controller CPU monitoring function with which the Q series C24 monitors the

programmable controller CPU based on the monitoring information reregistered by the user.

2.1 Overview

The following explains an overview of the programmable controller CPU monitoring function:

(1) Transmission without using a sequence program

(a) The programmable controller CPU monitoring function enables the Q series C24 to

monitor the local station's programmable controller CPU at time intervals set by the

user by reregistering data to be used for the programmable controller CPU

monitoring function. Data transmission and notification to the external device is

possible by communication using the MC or non procedure protocol without using a

sequence program.

(b) The following monitoring information selected by the user can be sent or notified to

the external device as the programmable controller CPU monitoring results.

transmission--are used to transmit and notify the programmable controller CPU

monitoring results to the external device.

• In the constant cycle transmission, transmission and notification are performed each time the programmable

controller CPU is monitored.

• In the condition agreement transmission, transmission and notification are performed when the information

read from the programmable controller CPU satisfies the user-defined conditions and an error is detected in

the programmable controller CPU.

Item Monitoring result

Without the modem

function

Combined use of the

modem function

(modem

communication)

Data

transmission

Local station programmable

controller CPU device (information

on the device to be monitored)

Numeric value stored in a word device

ON/OFF status for a bit device

Status of modules of the local station programmable controller CPU

Notification Notification message registered in data for connection (character string data) 